isosurf matrixoutput format?

What is the format of the matrix that results from isosurf with matrixoutput on?

If I set the dim to one (e.g. in jit.gl.isosurf.help) it yields a 1x15 matrix, dim=2 gives 1x120, dim=3 gives 1x405 (all 12 plane...)

Is this triangle strip data? (trying obj export...)

thanks -Matt